Rosaryville, MD has a population of 11,189 and is the 3,616th largest city in the United States. The population density is 1,218 per sq mi which is 157% higher than the Maryland average and 1244% higher than the national average. The median age in Rosaryville is 41 which is approximately 8% higher than the Maryland average of 38. In Rosaryville, 54% of the population over 15 years of age are married, 94% speak English and 3% speak Spanish. 31% of Rosaryville residents were born in Maryland, 63% were born out of state, 1% were born outside of the United States and 6% were foreign born.